Neutrino Mixing in a Democratic-Seesaw-Mass-Matrix Model

Details Neutrino Mixing in a Democratic-Seesaw-Mass-Matrix Model Neutrino Mixing in a Democratic-Seesaw-Mass-Matrix Model

1996-03-22

arxiv.org/abs/hep-ph/9603376v2

Mod.Phys.Lett. A11 (1996) 2849-2860

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages (latex) + 3 figures (postscript), uuencoded

Scientific paper

10.1142/S0217732396002836

On the basis of a seesaw-type mass matrix model for quarks and leptons, $M_f \simeq m_L M_F^{-1} m_R$, where $m_L\propto m_R$ are universal for $f=u,d,\nu$ and $e$ (up-quark-, down-quark-, neutrino- and charged lepton-sectors), and $M_F$ has a form [(unit matrix)+(democratic-type matrix)], neutrino masses and mixings are investigated. It is tried to understand a large $\nu_\mu$-$\nu_\tau$ mixing, i.e., $\sin^2 2\theta_{23}\sim 1$, with $m_{\nu 1} \ll m_{\nu 2} \sim m_{\nu 3}$, which has been suggested by the atmospheric neutrino data.

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